<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>优先级</title>
  <style>
    html {
      font-size: 20px;
    }

    body {
      font-size: 40px;
    }

    #winning {
      background-color: red;
      border: 1px solid black;
    }

    p {
      font-size: 30px;
      padding: 1rem;
      margin: 1em;

    }

    .better {
      background-color: gray;
      border: none !important;
    }
  </style>
</head>

<body>
  <p class="better">This is a paragraph.</p>
  <p class="better" id="winning">One selector to rule them all!</p>
</body>

</html>